<?php 
$timestamper->the_category_dayofweek();
echo ", der ";
$timestamper->the_category_time('j. F Y');
echo " um ";
$timestamper->the_category_time('H.i');
echo " Uhr ";
$timestamper->the_category_time('T');
echo " ( ";
$timestamper->the_gmt_diff('Stunden'); 
echo ")"; ?>